Pan rotary kiln



May26,1 931." L. B. MODANIEL 1,807,069

PAN ROTARY KILN Filed March 7, 1930 s Sheets-Sheet 1 May 26, 1931. L. B. MODANIEL} 1,807,069

PAN ROTARY KILN Filed March 7, 1,930 3 Sheets-Sheet 2 May 26, 1931. I h MCDANIEL 1,807,069

PAN ROTARY KILN Filed March '1. 1930 s sheets-sheet a rm 1 1m m ego and a portion of the P Patented May 26, 1931 Lnvi :BL MQDANI'EL, or conofnn'rn, wrsnmewoa' metata- PAN norAnY K'ItN Application filed March 7,

This invention relates to new and useful improvements in kilns, and particularly to cement kilns. I "Qne object of the" invention is to provide a device of this character by means of which the slurry is more quickly and effectively transformed into clinker, than in similar devices heretofore.

Another object is to provide a device of To this character wherein the heat issuing-from the clinker is utilized to advantage, instead of being wastetl,fa'swith the kilns now in general use.

Other objects and advantages will be ap I5 parent from the-following description When taken in connection'with the accompanying drawings.

In the drawings: V 1 Figure 1 is a plan iew of the rotary pan I Figure 2 is a vertical longitudinal secti'onal view on the line 2-2 of Figure 1. Figure '3 is a continuation of the sectional view on the line'2'2' of Figure 1, and is to be read in connection therewith.

Figure 4 is a vertical transverse sectional view on the line H of Figure 1.

Figure 5-is a vertical longitudinal sectional view on the line 55 of Figure 1.

Refer-ring particularly to the accompanying drawings, representsa circular series of cement piers on the upper ends of which are supportedtheouter' ends of the arms 11, of the kiln supp'ortingfspider, designated as a whole by the numeral 12. The'inner ends of the arms 11' are secured to the ring 13. Disposed concentrically inward of the piers 10 is a circular series of shorter piers 1 1, the upper ends of-which have the brackets 15 mounted thereon, and each of said brackets supports a roller 16-, to which more particular reference will be made: later herein. Located centrally of the series of piers 14, is 'abase 17, on which is mounted an upwardly extending tubular m'emb'er' l8. Disposed directly above the tubular member 18 is ahorizonta'l 7 tubular member 20 which prsperly fits with the tahaiarmembar 18,: ate: resta'on the 1930. seen at. 434,105;

anti-friction bearings 21, therein. Secured to the plate 19, and extending radially-therefrom, are the metal beams 22, and secured to the upper faces ofsaid beams are. themeta'l plate's 23, wherebyto formJa'pan. secured to the lower faces of the 'beams'22is a circular track24 which rests on'th'e'rollers 16, for rotary movement. Built on the plate 19.1-isra fire-brick wall 25, and disposedashortydis-s 'tance above the wall is a horizontal disk of 6'0 clinker concrete 26, which torins the center of the cover 27, of the pan. Theremaind er of the-cover 27 is divided radiallyihtothe segments 28, and each segment is dfryi'dedcir oularly into a plurality of parts29; Alllo'f '65 the parts 29 are fitted togetherby: tongue and groove j oint-s 30. Each of the parts 29, and the center disk 26, is provi'ded'with an bedded eye-bolt:31-, while the radial beams of arms 11 are provided with similar eye-bolts 32; Rods 33, each having hooks Man-d 3 5 at its ends are provided for engagementwith the eye-bolts of the cover parts, and of the beams 11, forthe purpose of supporting the cover over the'pan. It will be-noted, that the 7 outermost of'the parts 29 are each formed with a depending flange 36, which serves as the outerwall ot the pan. On the upper face of. the fioor o'f'theipan are placed-'a-quantity of cold clinkers 37, at the desired depth, and in this mass of clinkers the lower edgeot the flange 36,. of the cover, plows, as the pan-is rotated. On the bottom of the pan,- outwardly of the track 24,.is a toothed track 38, which is engaged byithe'gear 39, of the shaft 40, of a suitable motor 4:1,whereby the-pan is caused to rotate. a

In the said flange are formed openings 42, and disposed throughsaid openings. are the oil burners 43. The burners are inclined downwardly toward the floor. ofthe pan, and

are arrangediin batteries of three, one'battery being spaced fromthe pan floor a' distanceot' :three inches, the next 'batteny'beingspaced a distance of five inches, while the nextbat- =tery is spaced 'a-distance of three inches from said floor.

n. will, of that, bean-demoed that the burners 43 maybe useditor turning pew Sunk in the ground, adjacent the set of piers 10, is a pit 44, said pit being divided 7 metal reinforcing core 50, such rake bein b disposed in a horizontal position through the opening 47, with one endresting on one of the cement piers 10, and its other end in position,to rake "the .clinlrers from :the/pan, throughfsaid opening'47, so that such clinkers will fallonithe adjacent end of a conveyor to be, later'described. .Disposed within each .of thechambers 45,.of, the pit 444, are thez'vertical pipes 51, which are connected, at their oppositerends, to the headers 52, arranged respectively at the upper and lower ends ;.of;the chambers. Extending alongthe outsidesof the chambers 45, at a, level just below that of the inlet46, is a trough 53, in which runsthe upper lap of the'dragchain 54, said chain being provided with regularly spacedflights 55,"whicl1 drag the hot clinkers which falliinto the trough, through the opening. 56,- and cause, them toffall through the opening. '57, in the trough, intoithe, chamber 45.", This "trough is provided/with; one of these openings 57 over each chamber 45, and each-openingis providedrwith a manually operable. valve; 158, so.tha-twhen sufficient clinkers have fallen into the first chamber the attendantlcloses the first valve, and opens the second valve, thus permitting the clinkers to be depositedinthesecond chamber, 45.

; {Adjacent the other end of-the chamber 45 is a, stack. 59., and establishing communication between the chambers45 and said stack is aiflue;60.- Within this flue 60.. are arranged the inclinedboiler tubes61, connected to the headers 62, saidheaders being connected with the upper headers'ofthe pipes 51, by means ofthepipes. 63; The lower lap of the-conveyor chain 54 is supported on the idler rollers .64, beneath the trough.

In thecover 27 there are formed the radia ally extending series of openings 65, through whichthe slurry isintroduced to the pan.

In the operationof the; device,the burners 43 are ignited, and the slurry fed through the openings 65, until the floor of the pan is properly filled; At thistime the; pan isset into rotary movement, whereupon the intense heat from said burners. act upon the slurry .to first dry outthe moisture, and then reduce: the slurry .to clinker form; v The rake 48 is in a stationary position, and'rak'esthe .clinkers continuouslyQwhilezthe kiln pan is rotating,.tocausethe hot clinkers to be forced out through the opening 47 ,Land onxther-conveyor chain 54, which carries the clinkers forward for deposit in the first chamber 45, through the opening 57, of the trough, These clinkers are permitted to rise to a predetermined level, in this pit chamber, when the operator closes the valve thereof, and opens the valve of the next chamber, Whereupon the clinkers will then fall into the second chamber 45. After the third chamber has been permitted to fill, the operator per- 'mits 'thefirst chamber 45 to dischargethe clinkers. The first chamber is being discharged while the last chamberis being filled,

so that when the first chamber has emptied the clinkers therefrom, the last chamber has filled, so that the operator permits the, first one to refill, while at the same time he per mits the second chamber to empty. VWhen the ,second chamber has emptied, the operatorpermits the third chamber to empty. 7

The heat from the; clinkers, whendeposited in the pit, and in contact with the pipes, heats the contents of such pipes, which is water,whereby to generate steam for various purposes at theplant, aswill be;re adily understood. j Attention is particularly called to; the form of the kiln, on which the clinkers are formed, as well as the locationof the'burners; The burners are, formedin batteries of three, as before mentioned, each battery projecting its flames parallel to the slurry, at different distances therefrom, ranging from ,three to five inches, and at different distances with respect to the ,adjacentbatteries. The fact thatthe slurry isplaced on a rotarypan, and. the burners direct their flames parallel to the said-slurry, such-slurry will be more quickly and effectively heated so as to form clinkers, than in the inclined tubular kilns now in general use, wherein the, flames travel fromone to ;three feet from the M slurry. When the kiln floor passes under the rake 48, said floor will be extremely hot :(about 2000 F.) when it receives thenew layer jofslurry. This preheating of the slurry, by the hot kiln'floor, will compensate, to i a great degree, forcthe long travel ofthe hotgases-in the tubular'kilns, now in general use.

vWhat isclaimed is; V 1. A cement kiln comprising a rotatable pan member, a cover'for the pan member, means for depositingslurry on the pan, and means for directing flameson' thejslurry. a

x 2. A. cement kiln. comprising a rotatable pan member, acover'forthe pan member, means associatedwithlthe coverfor deposit: ing slurry on the pan, and mearisfofdireot: ing flameson the slurry.-

3. A cement; kiln comprisinga rotatable pan member, a rcovenfor the pan member,

means'for depositing slurry on the pan,xand

means associated-with the cover' f0r-directing flames on the slurry. 4 p i r' ,4.:A.;cement kiln comprising .arotatable pan member, a stationary cover for the pan member having slurry receiving openings, and burners for directing flames on the slurry, through said cover.

I 5. A cement kiln comprising a rotatable pan member, a cover for the pan member, and means associated with the cover for depositing slurry on the pail, and means associated with the cover for directing flames on the slurry.

6. A cement kiln comprising a rotatable pan member, a stationary cover for the pan member having slurry receiving opemngs, and burners projecting inwardly through the sides of said cover in position to direct their flames on the slurry.

7. A cement kiln comprising a rotatable pan member, a stationary cover for the pan member having slurry receiving openings and a depending peripheral flange, said flange contacting with the slurry and clinkers in said pan, and means for discharging the clinkers from the pan.

8. A cement kiln comprising a rotatable pan member for supporting the slurry to be burned to clinkers, a stationary suspended cover arranged over the pan and having a depending peripheral flange resting within the slurry and clinkers, said cover being formed of separable sections, means for discharging the clinkers from the pan, and means for conveying such clinkers to points where the radiating heat, due to cooling of the clinkers, can be utilized.

9. A cement kiln comprising a rotary pan, a stationary cover suspended above the pan, a pit adjacent the pan, a conveyor extending 7 from the pan across the pit, and means on the pan for raking the hot clinkers therefrom onto the conveyor, said conveyor being arranged to deposit the clinkers in said pit.

10. A cement kiln comprising a rotary clinker forming means in the form of a rotatable horizontal pan, a pit adjacent the pan having chambers, a conveyor extending across the upper ends of said chambers for conveying the hot clinkers from the pan to said chambers, and means in the chambers for utilizing the radiant heat from the clinkers.

11. A cement kiln comprising a rotary clinker forming device in the form of a rotatable horizontal pan, a chambered pit adj acent the pan, a trough extending across the upper ends of the chambers and having valved outlets over the chambers, an endless conveyor movable in the trough, steam boiler tubes in the chambers to be heated by hot clinkers deposited from the conveyor, and means associated with the pan for raking the hot clinkers from the pan to the conveyor.

In testimony whereof, I aflix my signature,

LEVI B. MODANIEL. 

